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(Non/roden.) 'zsheet-s-sheet 1.

H. BURG'ESS.

FIM.

Y NVPETERS, PHDTQ-LITHGGRAPHER. wASmNGToN. D C.

,(No Model.) V 2 Sheets--Sheet 2.

. H. BURGESS. Centrifugal Extractor for Sugar Cane Juice and otherlLiquids.` No. 239,222. 'Patented March 22,1881.

N. PETEHS, PMOTaLITHOGHAPnER, WASMINGI'GNy D C.

` shall he narrow openings between them.

V UNITED STATES PrmltziwrA Finca.

CENTRlFuAL EXIRAHCIOR For SUGAR-CANE lulcr AND OTHER Lloulus.

- SPECIFICATION forming parpf Letters Patent No. 239,222, dated March22', 1881.

Application tiled .lanuary 24 1R81. (No model.)

To'all whom it 'mcg/'concerm Be it, known that I, HUGH BURGESS, asubject of the Queen of Great Britain and lreland, residing in RoyersFord, Montgomery county,Pennsylvania, have invented `certa-inImprovements in Centrifugal Extractors for Sugar-Cane Juice and otherLiquids, of which the following is a specification.

. The object of my invention is toconstructa lo machine for rapidly andthoroughly extracting juices from sugar-cane or liquids from othersubstances by the combined action of centrifugal force and directpressure.

In the accompanying drawings, Figure 1,

I 5 Sheet 1, is a vertical section of my improved centrifugalextractor;l Fig. 2, Sheet 2, a plan view Fig. 3, a sectional plan on theline l 2,

` Fig. l, and Fig. et a sectional plan on the line 2o `Aidis a verticalshaft, having its upper bearing ina boX secured to a suitable frame, ofwhich the beam B forms a partand its lower bearing in a step, b, securedto a suitable foundatiomd. This shaft is tubular, and its 2 5 upper endhas a stuffing-box for admitting the end of a pipe, D, which isfurnished with a suitable stop-valve. I

The screen consists, in the present instance of substantial ribs f,preferably of T- iron,

3o these ribs being properly bound together and arranged at such adistance apart that there The upper end of the screen, comprising theribs f, is properly secured to a ring, h, lagainst which bear horizontaldisks or rollers i, the

spindles of which have their bearin gs in plates F secured to theframe-work of the machine, the rollers (of which there may be three ormore) serving to maintain the upper end of 4o the screen as it revolvesconcentric with the shaft A. The lower end of the screen rests in andisproperly secured to the ring j of a casting, G, the ring beingconnected to the hub K of the casting by a number of lugs, m,

for a purpose explained hereinafter.4 This screen-supporting casting isadapted to and can turn independently of the shaft A, and is driven by awheel which gears into the wheel L, the latter being secured to the hubof the 5o said casting. "Another wheel, M, is secured to the shaft Abelow the wheel L, and bel tween the two wheels there -is a loosecollar, u, on the shaft A. The screen is contained t lvo'of whichip p',are for the discharge ofthe rex racted liquids or juices, the thirdoutlet, l), ning` for the escape ofthe waste caneror uid has b "enextracted. f '\lrt will be seen that the scrggff T5' graduallycontracted in "lrtr;tHQ-;Ithe top toa iiange, 00, below whichf|'i'e"f'screen is enlarged at y, and is again gradually contracted fromthis point to the ring j of the casting G. The object of this peculiarshape of the screen will be rendered apparent hereinafter.

rlhe flan ge previously referred to, projects from and rotates with thescreen, and it overlaps a flange, q, projecting from the interior of thecasing N, so that all the liquids discharged from the screen above theflan ge :v must escape from the outlet p. `In like manner the tlange j,secured to thc lower end of the screen., overlaps a flange, q',projecting from the interior of the casing, so that all the liquidswhich are discharged from that portion of the screen between the twoangesw andj must pass through the outletp.

That portion of the shaft A which is contained within the screen has aspira-l flange, zo, which varies in diameter as the screen varies, sothat there may be as little space as possi ble between the edges of theflan ge and the screen. It is not essential to my invention, however,that this spiral iiange should be continuous, fora system of obliqueblades somewhat like those of a propeller may be secured to the shaft. p

`The operation of the abovedescribed machine is as follows: In treatingsugarcane, for instance, for the extraction of the saccharine juices,the cane, cut into comparatively small lengths, is fed into the top ofthe screen, and under the iniiuence ofthe spiraljian ge w of therevolving shaft A the cane is" fed downward until the whole space withinthe screen is tightly packed with the cane.` As the cane descends itmust necessarily be subjectedto .a continuouslyincreasing pressure, duetothe gradual con traction of the upper portion of the screen." Thecane, under this pressure, `yields its saccharine \vithin acasing, N,which has three outlets, I

bagass y or other materiahfrom which the IOO juices, which, bycentrifugal force due to the tween the lugs which connect the ri 55 thejuices from the cane.

io so that the cane, after passing through the contracted upper portionof the-screen, is saturated with water, and the enlargement .of thescreen permits the mass of cane to expand and absorb this water, afterwhich it is again sub- 1 5 jected to gradually-increasing pressure andthe water is extracted, carrying with it thejuices which it has washedfrom the cane, the com, bined water and juices heilig expelled by cenfItrifugal force and passing through the outlfet The waste disintegratedcane or baga sse passes from the lower end of the scree. be-

i 'g j and through him-K of the casting G, and thenc j the outlet??- Asregards the -jtl Ol T110 screen and the shaft A, it may be remaile'lthat the speed of the former must be determined by the centrifugal forceto dispose of the juices extracted by the pressure due to the spiraltiange. of the 3o rotating shaft; but there must always be such adifference between the speeds of the screen and that of the shaft thatwhile the former discharges the juices by centrifugal action the latterexerts a downward pressure to extract The shaft A must be rotated in adirection determined by the direction in which the iiange is coiledround the shaft, or according to the direction in which the obliqueblades are inclined, so that down- 4o ward pressure may be exerted onthe material to be operated upon.

An important result is attained by the arrangement of gearing described.When the machine is in operation the strain is exerted upwardly on theshaftand downwardly on the screen, so that the down-pressure on the topof the collar n between the two wheels will be counteracted by theupward pressure of the sha-ft against the under side of the said 5ocollar, and the step b will be relieved from that sion of the screen aty and the admission of water at this point may be unnecessary, thescreen being made on a gradual taper throughout; but in operating onsugar-cane I prefer this expansion of the screen.

I have referred above to the cutting of cane into comparatively shortlengt-hs before it is fed to the machine, but there may be a plate, s,on the beam B of the frame, as shown in Figs. l, and 2, and the stalksof cane can be held perpendicularly over the mouth of the screen", and aknife, s', on the upper edge of the flange w may strike the stalksagainst the said ,"plate, and thereby sever the same intol suitablelengths. The use of the peculiar screen shown and described, whilepreferred, is/not absolutely necessary, as screens of perforated plateor like material may be employed.

I claim as my invention-f- 1. The inode herein described of extracting"juices from sugar-cane or liquids from other substances, the said modeconsisting in applying pressure to the cane or other material inarapidly-revolying screen, substantially as set forth.

2. The combination of the tapering screen and shaft A, having a spiralflange or inclined blades, with gearing, whereby the within-describeddit'ferential rotation is imparted to the said screen and shaft. l 3.The combination of the shaft A,-having a spiral liange or obliqueblades, the screen and the iiange w, with the outer casing, N, having aninternal flange, q, and outlet p, as specified.

4. A centrifugal machine in which a tapering screen and a shaft having aspiral ange or oblique blades are combined with an outer casing, N,having an outlet or outlets for the liquid extracted and a separateoutlet for the material from which the liquid has been extracted,substantially as set forth.

5. A centrifugal machine in which a tapering screen enlarged at a pointbetween its upper and lower end is combined with a tubular shaft havinga spiral flange orinclined blades and orifices through which water orother liquid can be discharged at or near the point of enlargement ofthe screen, as specified.

6. rIhe within-described screen, consisting of T-bars bound together,with spaces between, as set forth.

In testimony whereof'I have signed my name to this specification in thepresence of two subscribing witnesses.

' Witnesses: .HUGH BURGESS.

J AMES F. TOBIN, HARRY SMITH.

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